72 750 Combat Roadster project

Some more progress - working on polishing up Z plates - some hand work with files and sanding with rubber flex block & 400 grit - then buffing out in two stages. Back sides glass beaded.
72 750 Combat Roadster project

72 750 Combat Roadster project

Primary cover on - new inspection caps to replace chewed up originals and proper tool for caps made up from aluminum bar stock -
72 750 Combat Roadster project

72 750 Combat Roadster project

And oil tank hung - tank went through boot camp at Colorado Norton Works -
72 750 Combat Roadster project

Thanks for looking -RT
 
If you look close in the head photo, you can see the "C" stamped in the center. As mentioned it may not be original to this machine, but it looks like a combat head. The SS combat cam has a noticeably larger intake lobe compared to the exhaust lobe. Also is stamped SS on the camshaft. These two would differentiate from the '73 high compression 750 sometimes referred to as combat although not.
 
Thanks to all for the interest and compliments - really enjoying this site - lotta fun seeing others work & bikes and glad for the helpful advice from others who have been down the road ahead of me clearing the mines . I'm going to likely need more help in the days to come because I can't hide from the dark world of electrical stuff much longer - gulp !!

Some more progress to share - Dave Taylor type head steady fitted - new Amal Premiers on and new SS airbox dry fitted . Z plates polished up and bolted up - new SS chain guard dry fitted.
72 750 Combat Roadster project

72 750 Combat Roadster project

72 750 Combat Roadster project

Thanks for looking - RT
 
Addendum - Made this mistake before but of course I didn't learn from it enough to not repeat it -
put the carbs on the intake runners first THEN fasten the runners to the head if you want to be able to tighten the inside nuts on carb flanges.:mad:
 
I’m enjoying seeing this thread.Bike looks great . I will be putting mine back together after Xmas, so I’m following with interest.Good quality pics too .Cheers.
 
A little more progress - coil group and oil lines fitted . Be aware that the instructions /illustrations for the SS rocker feed set from AN are in error . The instructions would have you arrange banjo bolts so the feeds on the banjos turn in towards the head . If done this way the splayed feed contacts the head first and will not allow the banjo to seat squarely . The illustration also shows the rubber shielding on the main feed going at the head end when in fact it should be at the bottom at timing cover banjo.
AN are aware of this - presumably they will correct the enclosed instructions.
72 750 Combat Roadster project

72 750 Combat Roadster project

And tires fitted - waiting on spoke weights to static balance .
72 750 Combat Roadster project


Waiting on new main harness then on to wiring and need to get a few pieces to the plating shop .

Thanks for looking in - RT
 
Richard Tool said:
Be aware that the instructions /illustrations for the SS rocker feed set from AN are in error . The instructions would have you arrange banjo bolts so the feeds on the banjos turn in towards the head . If done this way the splayed feed contacts the head first and will not allow the banjo to seat squarely .
Click to expand...

In my opinion, the banjos should angle inwards or the braided line will come into contact with the underside of the fuel tank and could saw a hole in it! The cross-over section once again is also far longer than it needs to be.
If necessary, add another sealing washer to space the banjo away from the head.

72 750 Combat Roadster project


72 750 Combat Roadster project
 
Last edited:
Thanks L.A.B. - I will fit the tank temporarily to check clearances - Simon Amos tells me that they are supposed to splay outward and the illustration is in error but you raise a valid concern - I will post findings.
 
You can pitch the cross over back a bit further if you are worried about cutting into your tank as mentioned above. I have the Venhill set, your cross over section looks lengthy, too long to orient frontward.

72 750 Combat Roadster project


No, it aint rubbin on the head....
 
NPeteN said:
You can pitch the cross over back a bit further if you are worried about cutting into your tank as mentioned above. I have the Venhill set, your cross over section looks lengthy, too long to orient frontward.
Click to expand...

Yes, as the crossover section is too long unless it is shortened then there's really no option other than to fit it in the rearward position where it will be clear of the tank.
 
Thanks Gents for the valid points - at this point the rocker feeds are only loosely fitted so I can play around a bit . When I first fitted I followed the instructions ( imagine that ! ) and oriented the banjo feeds inward but as noted the feeds contacted the head.
If I orient the cross feed towards the back to clear the fuel tank it may block the plates for the intake rockers but I suppose that is better than chafe on lines / tank .
 
I'd look into shortening the line if possible. Your bike is too nice to have oil lines flapping in the breeze.
A nice, neat form fitting cross over line can really make or break your bike ;)
 
NPeteN said:
I'd look into shortening the line if possible. Your bike is too nice to have oil lines flapping in the breeze.
A nice, neat form fitting cross over line can really make or break your bike ;)
Click to expand...
Agreed - with the money I paid for the set I should think it would fit better . I just set up tank and all clearances ok with cross over line in intake runner area and main line pulled down at timing cover banjo but both now block rocker spindle plates . I will try crossover oriented way forward by coils to see if that is a possibility but I would much prefer it being tucked up out of harm's way .
 
Addendum - I assume that the fittings on these lines are swaged in some fashion and without the proper dies/ press etc. it is beyond my capability to shorten it myself .
 

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